Citrus gall ?insect or physiological Minimize

March 2009. Galls from Citrus found in Pohnpei, Federated States of Micronesia. One gall measured 2 inches and was oval. It was thought to be caused by Bruchophagus fellis which is present in Australia. But according to the literature the galls of B fellis are oblong, not round. No holes were present, nor were there larvae inside. Could it be physiological?

A member replied that galls of B fellis on lemons in Victoria, Austrralia, do not look like the picture shown, so it may well be a physiological problem as suggested.